COP 4331 Recitation #2

Kia Manoochehri◦ kiam@knights.ucf.edu

Office Hours: 1:30-3:30 Tuesday / Thursday◦ HEC 308 (The Cave)

COP 4331 Recitation #2

Unified Modeling Language

Class & Sequence Diagrams

Each class is divided into three components:

Class Diagram

Each class is divided into three components:

Class Diagram

Class Name

Each class is divided into three components:

Class Diagram

Class Name

Attributes

Each class is divided into three components:

Class Diagram

Class Name

Attributes

Attributes can be:+ Public- Private# Protected

Each class is divided into three components:

Class Diagram

Class Name

Attributes

Operations

Class Diagram example:

Class Diagram example: Patron

Class Diagram example: Patron

# ID_Number : integer+Name : String- Fines : double

Class Diagram example: Patron

# ID_Number : integer+Name : String- Fines : double

checkFines()payFines()

Class diagrams also contain information regarding the relationship between them◦ Association

◦ Dependency

◦ Generalization

Class Diagram

Association: A link indicating that two classes need to communicate with one another

Class Diagram

Student Professor

Association: A link indicating that two classes need to communicate with one another◦ Multiplicity: Every professor has 1 or more

students

Class Diagram

Student Professor[1…*]

Association: A link indicating that two classes need to communicate with one another◦ Multiplicity: Every professor has 1 or more

students

◦ Role Names: Students learn from Professors

Class Diagram

Student Professorlearns fromteaches

Aggregation: “has a” association. Each part exists outside of the whole

Shown by using an empty diamond

Class Diagram

Car

Wheel

Engine

Composition: demonstrates strong ownership, the part cannot exist without the whole and vice versa

Shown by using a filled diamond

Class Diagram

Person

Arm

Leg

Dependency relationship: ◦ Is a semantic relationship between classes

because the functionality of one depends on the other

Class Diagram

Calendar

addEvent(p: Party)

Party

Generalization: connection between a subclass and a superclass

Class Diagram

People

Student Professor

Sequence diagrams emphasis the time ordering of messages

Sequence Diagram

Sequence diagrams emphasis the time ordering of messages◦ Objects create the “object life line”

Sequence Diagram

Messages are shown by a horizontal line between life lines◦ May include a condition

Sequence Diagram

Customer Bank

withdraw money

A return message is a response from the object

Sequence Diagram

Customer Bank

withdraw money

money

The end of an object life line is demonstrated by an X

Sequence Diagram

Bank